Archibald montgomery



(N0 Model.)

A. MONTGOMERY.

GRINDINGMILL. 4 No. 266,182. Patented Oct. 17, 1882 FIG, 1, '1

2 JZ E d 0 Nrrao rates PATENT Unison.

AROHIBALD MONTGOMERY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HENRYTROEMNEE, OF SAME PLACE.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 266,182, dated October17, 1882.

Application filed May 5,1882. (No model.)

To all whom it may concern:

Be it known that I, AROHIBALD MONTGOM- ERY, a subject of the Queen ofGreat Britain and Ireland, and a resident of Philadelphia,

Pennsylvania, have invented certain Improvements in Grinding-Mills, ofwhich the following is a specification.

The object of my invention is to so construct a grinding-mill that readyaccess may be had to the interior of the same for the removal ofobstructions.

In the accompanying drawings, Figure 1 is a plan view, partly insection, of my improved grinding-mill; Fig.2, a longitudinal section of'15 the same, with some of the parts in a difi'erent position; Fi 3, atransverse section on the line 1 2, Fig. l; and Fig. 4, a section ofpart of the fly-wheel and driving-shaft.

A is the baseplate ot' the mill, having atopposite ends plates to a, inwhich are formed bearings for the shaft B, the latter carrying thehollow conical shell or burr D of the mill.

E is the outer shell, which is furnished with projecting wings I) 1),adapted to embrace rods d d, the latter being secured at the ends to theplates to a, and thus forming guides, on

which the shell E may be moved back from the burr D, as shown in Fig. 2,so as to permit ready access to the interior of the mill when it becomesnecessary to remove obstructions therefrom. The wing b of the shell E issplit, as shown in Figs. 1 and 3, and has ears f f, which can becontracted by means of a thumb-screw, 9, so as to cause the said wing bto bind tightly upon the rod d and retain the shell E in its properposition in respect to the burr D, as shown in Fig. 1,-during thegrinding operation, the shell being released from the rod on looseningthe thumb-screw, so as to permit said shell to be moved back, as shownin Fig. 2. I also avail myself of the movement of the shell E toregulate the fincness of the grinding by enlarging or contracting thespace between the burr and shell, the

shell E having a portion, i, turned or otherwise trued, so as to fitsnugly to a flange, m,

on the end plate a, and thus permit longitudinal adjustment of the shellE in respect to the burr D, while preventing the escape of any of theground materiahexcept at theoutletn. The

proper adjustment of the shell E may be governed by means of a lag onthe shell and a set-screw on the end plate a, as shown in Figs.

1 and 2. The shell Ecarries a hopper-neck,

p, which is furnished with a suitable valve, so as to cut off the flowof material when the shell is moved back, as shown in Fig. 2. v

In order to prevent injury to the burr and shell, owing to acontinuedapplication of power to the shaft B, either directly or by the momentumof the fly-wheel, after the rotation of the burr D has been stopped byan obstruction in the mill, I connect the driving-crank F and fiy-wheelG to the shaft by means of a friction-clutch, so that when the rotationof the shaft is suddenly arrested the friction will be overcome and themovement of the crank or wheel independently of the shaft permitted. Theclutch on the crank comprises a split hub and thumb-screw, and that onthe 0 fly-wheel consists of a block adapted to a box in the hub andacted upon by a thumb-screw and spring, as shown in Figs. 1 and 4.. Thecrank alone may be used on the shaft in some cases, or the fly-wheelalone may be employed, 7 the latter in such case, however, beingprovided with a handle for the application of power thereto, or beingadapted for the reception of a driving-belt.

In carrying out my invention other means than the rods d may be used forguiding the shell E, and a fastening device other than the split wing bmay be employed. For instance, the shell may have a projection bearingon the base A and slot-ted lugs adapted for the reception of bolts hungto the end plate a, said bolts being iurnished with nuts adapted to bearupon the lugs and hold the shell E in proper position in respect to theend plate.

I claim as my invention- 9o 1. The combination,in a grinding-mill, of afixed frame and ashaft, B, adapted to bearings therein, and having aburr, D, with alongitudinally-guided shell, E, capable of sliding towardand from the burr D to permit access 5 to the interior of the mill, anddevices, substantially as described, whereby the said shell E may besecured in position for grinding, as set forth.

2. The combination of the plates a a, the

rods (1 (1, connecting said plates, the shaft B, the bum D, and theshell E, having wings I) 11, adapted to the rods (1, as set forth.

3. The combination of the shaft B, burr D, 5 plates (4 a, rods d, andshell E, with wings I) I), said wing b being slitted and provided with atightening-screw, as set forth.

In testimony whercofI have signed my name I I I to this specification inthe presence of two subscribing witnesses.

AROIIIBAL'D MONTGOMERY.

Witnesses:

HARRY IJRURY, HARRY SMITH.

